﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WssServer.Helper
{
    /// <summary>
    /// txt文档处理
    /// </summary>
    public static class TxtHelper
    {
        /// <summary>
        /// 把文本文件内容读出来
        /// </summary>
        /// <param name="filename">文件名称</param>        
        public static string FileToString(string filename)
        {
            if (File.Exists(filename) == false)
            {
                return string.Empty;
            }
            StreamReader sr = new StreamReader(filename, Encoding.UTF8);
            string line = sr.ReadToEnd();
            sr.Close();
            return line;
        }
        /// <summary>
        /// 把文本写入到txt文件里面
        /// </summary>
        /// <param name="str"></param>
        /// <param name="fileName"></param>
        public static void StringToFile(string str, string fileName)
        {
            StreamWriter sw = File.CreateText(fileName);
            sw.WriteLine(str);
            sw.Close();
        }
        /// <summary>  
        /// 获取拼音  
        /// </summary>  
        /// <param name="str"></param>  
        /// <returns></returns>  
        public static string GetPYString(string str)
        {
            string tempStr = "";
            foreach (char c in str)
            {
                if ((int)c >= 33 && (int)c <= 126)
                {//字母和符号原样保留     
                    tempStr += c.ToString();
                }
                else
                {//累加拼音声母     
                    tempStr += GetPYChar(c.ToString());
                }
            }
            return tempStr;
        }
        ///      
        /// 取单个字符的拼音声母     
        ///      
        /// 要转换的单个汉字     
        /// 拼音声母     
        public static string GetPYChar(string c)
        {
            if (string.IsNullOrEmpty(c.Trim())) return "";
            byte[] array = new byte[2];
            array = System.Text.Encoding.Default.GetBytes(c);
            int i = (short)(array[0] - '\0') * 256 + ((short)(array[1] - '\0'));
            if (i < 0xB0A1) return "*";
            if (i < 0xB0C5) return "a";
            if (i < 0xB2C1) return "b";
            if (i < 0xB4EE) return "c";
            if (i < 0xB6EA) return "d";
            if (i < 0xB7A2) return "e";
            if (i < 0xB8C1) return "f";
            if (i < 0xB9FE) return "g";
            if (i < 0xBBF7) return "h";
            if (i < 0xBFA6) return "j";
            if (i < 0xC0AC) return "k";
            if (i < 0xC2E8) return "l";
            if (i < 0xC4C3) return "m";
            if (i < 0xC5B6) return "n";
            if (i < 0xC5BE) return "o";
            if (i < 0xC6DA) return "p";
            if (i < 0xC8BB) return "q";
            if (i < 0xC8F6) return "r";
            if (i < 0xCBFA) return "s";
            if (i < 0xCDDA) return "t";
            if (i < 0xCEF4) return "w";
            if (i < 0xD1B9) return "x";
            if (i < 0xD4D1) return "y";
            if (i < 0xD7FA) return "z";
            return "*";
        }
        public static string getNum(string str) {            
            string result = System.Text.RegularExpressions.Regex.Replace(str, @"[^0-9]+", "");
            return result;
        }

    }
}
